<template>
	<view>
		<!-- 搜索组件 -->
		<my-search  @click="gotoSearch"></my-search>
		<!-- 搜索组件 -->
		<view class="scroll-view-container">
			<!-- 左侧滑动区域 -->
			<scroll-view class="left-scroll-view" scroll-y="true" :style="{height: wh+'px'}">
				<block v-for="(item,i) in cateList" :key="i">
					<view @click="onChange(i)" :class="['left-scroll-view-item',i===active?'active':'']" class="left-scroll-view-item">{{item.cat_name}}</view>
				</block>
			</scroll-view>
			<!-- 左侧滑动区域 -->

			<!-- 右侧滑动区域 -->
			<scroll-view scroll-y="true" :scroll-top="scrollTop" :style="{height: wh +'px'}">
				<view class="cate-lv2" v-for="(item2 , i2) in cateLeve2" :key="i2">
					<!-- 二级分类标题 -->
					<view class="cate-lv2-title">
						/ {{item2.cat_name}} /
					</view>
					<!-- 二级分类标题 -->
					
					<!-- 三级分类 -->
					<view class="cate-lv3-list">
						<!-- 三级分类的item项 -->
						<view @click="gogoodsList(item3)" class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3">
							<!-- 三级分类的图片 -->
							<image :src="item3.cat_icon"></image>
							<text>{{item3.cat_name}}</text>
						</view>
						<!-- 三级分类的item项 -->
					</view>
					<!-- 三级分类 -->
					
				</view>
			</scroll-view>
			<!-- 右侧滑动区域 -->
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				wh: 0,
				cateList: [],
				active: 0,
				cateLeve2:[],
				scrollTop:0,
			};
		},
		onLoad() {
			const height = uni.getSystemInfoSync(); //获取当前设备的信息
			// console.log(height)
			this.wh = height.windowHeight - 50;
			this.getCateList();
		},
		methods: {
			//渲染左侧分类
			async getCateList() {
				const {
					data: res
				} = await uni.$http.get("public/v1/categories")
				if (res.meta.status !== 200) return uni.$showMsg();
				this.cateList = res.message;
				this.cateLeve2=res.message[0].children; 
			},
			onChange(i){
				this.active=i;
				this.cateLeve2 = this.cateList[i].children;
				 this.scrollTop = this.scrollTop === 0 ? 1 : 0
			},
			gogoodsList(item){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid='+ item.cat_id
				});
			},
			gotoSearch(){
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
			}
		},
	}
</script>

<style lang="scss">
	.scroll-view-container {
		display: flex;

		.left-scroll-view {
			width: 120px;

			.left-scroll-view-item {
				line-height: 60px;
				background-color: #f7f7f7;
				text-align: center;
				font-size: 14px;

				&.active {
					background-color: #FFFFFF;
					position: relative;

					// 渲染激活项左侧的红色指示边线
					&::before {
						content: ' ';
						display: block;
						width: 3px;
						height: 30px;
						background-color: #c00000;
						position: absolute;
						left: 0;
						top: 50%;
						transform: translateY(-50%);
					}
				}
			}
		}
	   
	}
	.cate-lv2-title{
		font-size: 14px;
		font-weight: bold;
		text-align: center;
		padding: 15px 0;
		
	}
	.cate-lv3-list{
		display: flex;
		flex-wrap: wrap;
		
		.cate-lv3-item{
			width: 33.33%;
			display: flex;
			flex-direction: column;
			justify-content: center;
			align-items: center;
			margin-bottom: 10px;
			image{
				width: 60px;
				height: 60px;
			}
			text{
				font-size: 12px;
			}
			
		}
	}
</style>
